package com.ruoyi.framework.web.service;

import com.ruoyi.common.constant.CacheConstants;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.constant.UserConstants;
import com.ruoyi.common.core.domain.entity.SysUser;
import com.ruoyi.common.core.domain.model.LoginUser;
import com.ruoyi.common.core.redis.RedisCache;
import com.ruoyi.common.exception.ServiceException;
import com.ruoyi.common.exception.user.*;
import com.ruoyi.common.utils.DateUtils;
import com.ruoyi.common.utils.MessageUtils;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.ip.IpUtils;
import com.ruoyi.framework.manager.AsyncManager;
import com.ruoyi.framework.manager.factory.AsyncFactory;
import com.ruoyi.framework.security.context.AuthenticationContextHolder;
import com.ruoyi.system.service.ISysConfigService;
import com.ruoyi.system.service.ISysUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.BadCredentialsException;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;

/**
 * 登录校验方法
 *
 * @author ruoyi
 */
@Component
public class SysLoginService {
	@Resource
	private TokenService tokenService;

	@Resource
	private AuthenticationManager authenticationManager;

	@Resource
	private RedisCache redisCache;

	@Resource
	private ISysUserService userService;

	@Resource
	private ISysConfigService configService;

	/**
	 * 登录验证
	 *
	 * @param username 用户名
	 * @param password 密码
	 * @param code     验证码
	 * @param uuid     唯一标识
	 * @return 结果
	 */
	public String login(String username, String password, String code, String uuid) {
		// 验证码校验
		validateCaptcha(username, code, uuid);
		// 登录前置校验
		loginPreCheck(username, password);
		// 用户验证
		Authentication authentication = null;
		try {
			UsernamePasswordAuthenticationToken authenticationToken = new UsernamePasswordAuthenticationToken(username, password);
			AuthenticationContextHolder.setContext(authenticationToken);
			// 该方法会去调用 UserDetailsServiceImpl.loadUserByUsername
			authentication = authenticationManager.authenticate(authenticationToken);
		} catch (Exception e) {
			if (e instanceof BadCredentialsException) {
				AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.password.not.match")));
				throw new UserPasswordNotMatchException();
			} else {
				AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, e.getMessage()));
				throw new ServiceException(e.getMessage());
			}
		} finally {
			AuthenticationContextHolder.clearContext();
		}
		AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_SUCCESS, MessageUtils.message("user.login.success")));
		LoginUser loginUser = (LoginUser) authentication.getPrincipal();
		recordLoginInfo(loginUser.getUserId());
		// 生成token
		return tokenService.createToken(loginUser);
	}

	/**
	 * 校验验证码
	 *
	 * @param username 用户名
	 * @param code     验证码
	 * @param uuid     唯一标识
	 * @return 结果
	 */
	public void validateCaptcha(String username, String code, String uuid) {
		boolean captchaEnabled = configService.selectCaptchaEnabled();
		if (captchaEnabled) {
			String verifyKey = CacheConstants.CAPTCHA_CODE_KEY + StringUtils.nvl(uuid, "");
			String captcha = redisCache.getCacheObject(verifyKey);
			redisCache.deleteObject(verifyKey);
			if (captcha == null) {
				AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.jcaptcha.expire")));
				throw new CaptchaExpireException();
			}
			if (!code.equalsIgnoreCase(captcha)) {
				AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.jcaptcha.error")));
				throw new CaptchaException();
			}
		}
	}

	/**
	 * 登录前置校验
	 *
	 * @param username 用户名
	 * @param password 用户密码
	 */
	public void loginPreCheck(String username, String password) {
		// 用户名或密码为空 错误
		if (StringUtils.isEmpty(username) || StringUtils.isEmpty(password)) {
			AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("not.null")));
			throw new UserNotExistsException();
		}
		// 密码如果不在指定范围内 错误
		if (password.length() < UserConstants.PASSWORD_MIN_LENGTH
				|| password.length() > UserConstants.PASSWORD_MAX_LENGTH) {
			AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.password.not.match")));
			throw new UserPasswordNotMatchException();
		}
		// 用户名不在指定范围内 错误
		if (username.length() < UserConstants.USERNAME_MIN_LENGTH
				|| username.length() > UserConstants.USERNAME_MAX_LENGTH) {
			AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.password.not.match")));
			throw new UserPasswordNotMatchException();
		}
		// IP黑名单校验
		String blackStr = configService.selectConfigByKey("sys.login.blackIPList");
		if (IpUtils.isMatchedIp(blackStr, IpUtils.getIpAddr())) {
			AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("login.blocked")));
			throw new BlackListException();
		}
	}

	/**
	 * 记录登录信息
	 *
	 * @param userId 用户ID
	 */
	public void recordLoginInfo(Long userId) {
		SysUser sysUser = new SysUser();
		sysUser.setUserId(userId);
		sysUser.setLoginIp(IpUtils.getIpAddr());
		sysUser.setLoginDate(DateUtils.getNowDate());
		userService.updateUserProfile(sysUser);
	}
}
